Mass transfer and complexation in concentrated zinc/potassium halide electrolytes—II. Complexation and migration effects

✍ Scribed by A.D. Zdunek; J.R. Selman

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 998 KB
• Volume: 34
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(89)87189-0

✦ Synopsis

A speciation analysis of concentrated ZnCl,/KCl solutions indicates that four species: Zn2+, ZnCl+, ZnCl; and ZnCl:-, are present in varying amounts in the concentration range studied. Proton NMR spectroscopy performed on several solutions also confirms this. A computer analysis was undertaken to model the transport of species to the electrode and to correct for the migration effect of the halozinc comulexes. Diffusivities calculated from the corrected limiting currents are presented and their relationship to solution structure and viscosity is discussed.